A Controlled Benchmark of Visual State-Space Backbones with Domain-Shift and Boundary Analysis for Remote-Sensing Segmentation. - Nichula Wasalathilaka; Dineth Perera; Oshadha Samarakoon; Buddhi Wijenayake; Roshan Godaliyadda; Vijitha R. Herath; Parakrama Ekanayake (CoRR, 2026)